Boyfriend was cheating our entire relationship!

I met a man who I thought was the one. Yes, he was divorced with children and I'm never married with none, but I was smitten right away. We hit it off and agreed to become exclusive about a month or two in. Little things started happening that didn't add up and I became suspicious as I have been cheated on before. Over the next two months I caught him in lies and started seeing random cars at his house when I'd show up unexpectedly (yes I did that). Come to find out he was cheating on me the whole time. He had girls on rotation that would see him the one or two nights out of the week I wasn't there. He had a girl over the night we agreed to be exclusive. I dumped his sorry ass last week, but my question is how do I not let this effect my self esteem? It hurts to know he not only had one girl, but multiple girls along for the ride. Why he felt the need to lie to my face every single time I'd question it. He had the option to leave anytime, but never took it. This is very damaging to do to another person and he seems to think it's both of our faults. I pushed him to do it. I don't know how I pushed when he was doing it from the start. This is really hard for me to understand. Anyone else experience this? And is there a chance he'll pop up in the future once I'm doing well again?